hydrant
very fast at protocol indexer with flexible filtering, xrpc queries, cursor-backed event stream, and more, built on fjall
rust fjall at-protocol atproto indexer
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Version history of src/api/mod.rs

May 2026

ptr.pet
[jetstream] introduce jetstream compatible endpoint for indexer and relay
committed
oyster.cafe
[api] websocket pong & better ping, round 2
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oyster.cafe
Binding multiple listen addresses
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April 2026

ptr.pet
[all] add indexer_stream feature to decouple the events stream from the indexer
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ptr.pet
[all] simplify code depending on block storage being enabled
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ptr.pet
[api] fix index page to show indexer if compiled with indexer
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ptr.pet
[api] also add _health
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ptr.pet
[api] add index file
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ptr.pet
[all] re-organize types and feature gates
committed

March 2026

ptr.pet
[relay] ratelimits, ratelimit tiers and management
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ptr.pet
[all] internal relay backed indexer
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ptr.pet
[ingest,lib,api] relay mode, sync fixes
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ptr.pet
[lib,api] implement runtime firehose management
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ptr.pet
[lib,api] implement runtime crawler source control
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ptr.pet
[all] implement backlinks
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ptr.pet
[all] programmatical api / hydrant-as-library
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ptr.pet
[api] add /db/compact, move /train_dict to /db/train, document
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ptr.pet
[api,ingest,crawler] add a way to pause / resume crawler and firehose at runtime
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ptr.pet
[db] implement zstd compression with dict support
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ptr.pet
[api] fix router for stream
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ptr.pet
[api] event ack route, unused for now
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ptr.pet
[all] drop jacquard, jacquard-axum, and some minor deps, use our own firehose stream impl
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ptr.pet
[all] rework the filter api, re-introduce the repos management api
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February 2026

ptr.pet
[filter] implement filter system, replace /repo with /filter
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ptr.pet
[types,db] make what we store more efficient
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ptr.pet
[appwide] refactor ingesting, api and bunch of stuff, should be a lot more consistent and durable now
committed
ptr.pet
[api] put debug api in a different router that we bind on a different port, disabled by default
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ptr.pet
[api] update handlers for new lifecycle states and remove redundant module
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January 2026

ptr.pet
init project
committed